Source code for openalea.oalab.editor.line_number

# -*- python -*-
# 
#       OpenAlea.OALab: Multi-Paradigm GUI
#
#        http://qt.developpez.com/doc/4.7/widgets-codeeditor/
#
#       Copyright 2013 INRIA - CIRAD - INRA
#
#       File author(s): Julien Coste <julien.coste@inria.fr>
#
#       File contributor(s):
#
#       Distributed under the Cecill-C License.
#       See accompanying file LICENSE.txt or copy at
#           http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html
#
#       OpenAlea WebSite : http://openalea.gforge.inria.fr
#
###############################################################################
__revision__ = ""

from openalea.vpltk.qt import QtCore, QtGui

class Margin(QtGui.QWidget):
    ## Come from LPy
    def __init__(self,parent,editor):
        QtGui.QWidget.__init__(self,parent)
        self.editor = editor
        self.showLines = True
    def paintEvent( self, paintEvent ):
        if self.showLines:
            maxheight = self.editor.viewport().height()
            maxline = self.editor.document().blockCount()
            painter = QtGui.QPainter(self)
            painter.setPen(QtGui.QPen(QtGui.QColor(100,100,100)))
            h = 0
            line = -1
            while h < maxheight and line < maxline:
                cursor = self.editor.cursorForPosition(QtCore.QPoint(1,h))
                nline = cursor.blockNumber()+1
                rect = self.editor.cursorRect(cursor)
                if nline > line:
                    line = nline
                    painter.drawText(0,rect.top()+2,40,rect.height()+2, QtCore.Qt.AlignHCenter|QtCore.Qt.AlignTop,str(line))
                h = rect.top()+rect.height()+1
            painter.end()
    def mousePressEvent( self, event ):
        line = self.editor.cursorForPosition(event.pos()).blockNumber() 
        self.emit(QtCore.SIGNAL("lineClicked(int)"),line+1)